On the Spectral Efficiency of Selective Decode-and-Forward Relaying

Multirelay cooperative relaying enables spatial diversity, often at the expense of spectral efficiency. To alleviate the loss in spectral efficiency due to half-duplex relaying and transmission over orthogonal channels, the authors propose a novel transmission scheme for selective decode-and-forward (DF) networks. In this scheme, the authors assume that destination may receive signals from transmitting nodes with different modulation levels. Particularly, the authors obtain a closed-form expression for both end-to-end (E2E) average error probability and spectral efficiency in such a scheme. Subsequently, using these closed-form expressions and average channel statistics, the authors perform joint optimization of power allocation and modulation level selection to maximize the E2E spectral efficiency while maintaining a target E2E average error probability and a set of transmit power constraints. Simulation results demonstrate that the transmission scheme proposed herein improves the E2E spectral efficiency significantly, in comparison with the conventional adaptive DF transmission scheme.

• Record URL:
  https://doi.org/10.1109/TVT.2016.2607159
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00189545
• Supplemental Notes:
  • Copyright © 2017, IEEE.
• Authors:
  • Sokun, Hamza Umit
  • Yanikomeroglu, Halim
• Publication Date: 2017-5

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: pp 4500-4506
• Serial:
  • IEEE Transactions on Vehicular Technology
  • Volume: 66
  • Issue Number: 5
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • ISSN: 0018-9545
  • Serial URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=25

Subject/Index Terms

• TRT Terms: Modulation (Communications); Optimization; Probability; Radio relay systems; Radio wave propagation; Resource allocation; Transmission errors and interference; Transmission loss; Wireless communication systems
• Subject Areas: Data and Information Technology; Transportation (General);

Filing Info

• Accession Number: 01638448
• Record Type: Publication
• Files: TRIS
• Created Date: May 18 2017 1:51PM